Flutter "flutter_webview_plugin" Android back button problem

Question

Im using the flutter plugin "flutter_webview_plugin" for open an URL inside my app. The problem, is when in Android, you press the back button, it "returns" and show the progress indicator infinitely on the WebViewScaffold until you press again the back button.

I tried adding this code within builder function:

    flutterWebviewPlugin.onDestroy.listen((_) {
        if (Navigator.canPop(context)) {
          Navigator.of(context).pop();
          flutterWebviewPlugin.dispose();
          flutterWebviewPlugin.cleanCookies();
        }
      });

It works for the "first" time i call my function. But, on the second, it happens again.

_launchURL() async {
    String url = result;
    if (await canLaunch(url)) {
      Navigator.of(context).push(MaterialPageRoute(
          builder: (ctx) => WebviewScaffold(
                clearCache: true,
                clearCookies: true,
                withLocalStorage: false,
                appCacheEnabled: false,
                initialChild: Center(child: CircularProgressIndicator()),
                url: url,
                appBar: AppBar(title: Text("Fichas DoggyStyle")),
              )));
      flutterWebviewPlugin.onDestroy.listen((_) {
        if (Navigator.canPop(context)) {
          Navigator.of(context).pop();
          flutterWebviewPlugin.dispose();
          flutterWebviewPlugin.cleanCookies();
        }
      });
    } else {
      throw 'No pudimos abrir la ficha :(';
    }
  }

Sigma App Development · Accepted Answer · 2019-02-20 06:42:29Z

1

Try calling flutterWebviewPlugin.onDestroy.listen() inside the initstate() of a widget... it works fine for me...

answered Feb 20, 2019 at 6:42

Sigma App Development

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1 Comment

sebarck Over a year ago

Thank you very much! Solved my problem.

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